Took me to debt collectors without claiming from me first and can not explain where they amount they claim I owe come from because it’s after paid up settlement given by them to me and procedure to close the contract was followed by client advised by the

This is the second review so after writing about how they still claim I owe them after 3 months of settlement of closing my contract phone, where they say after paying them almost R18000,00 and Now they say I owe them ,R1200,00 which would not make sense because I cancelled the contract and if the was an error on their side or they did no close the contract thou I followed the procedure they provided me , I will still be ahead of payment and still not owe, not forgetting the fact that my contract was a debit order so wanted ever was due to them they could have deducted, and I am not the one who cancelled the debit order but themselves they had access to founds and did not deduct and I have never reversed a payment neither it bounced because of lack of fundamental, the would have not come any point an time where I would need to make paying arrangements with them, not only they can not explain the money they say I owe, where it’s coming from and the fact that they took me to credit collection without first communication with me, and still there’s no one following up to my claim or complaint, rather their response after doing a review with them it’s them sending me a final letter of demand giving me 21 days before they blacklist me without attending or investigating my complaint, their practices it’s so bad and I responded to an email which they say I must respond to but it keeps sending you to more links, there’s no way of communicating with them and they don’t care for their clients at all, they have not reached out or try to sort out my complaint but more threats of blacklisting me, I indicated that I have no problem with paying the amount but I want to know what I am paying for first and explain to me as it’s after I paid them a lot of money and they still claim I owe , nothing they are saying makes sense because one you would have blocked my number, you would first claim directly from me before submitting the do called account you say I have, money must be accounted for and that is all I’m asking but rather I’m being dismissed by them and being threatened with being blacklisted without an explanation where the debt it’s coming from after I paid them a lot of money only because they can and they are a big company